CVE-2026-23870

HIGHCVSS 7.5/10EPSS 1.53%

Last modified

CVE-2026-23870 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to server crashes, out-of-memory exceptions or excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5).. EPSS estimates a 1.53% chance of exploitation in the next 30 days.

Description

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to server crashes, out-of-memory exceptions or excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5).

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.53%

72.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
FacebookReact-Server-Dom-Parcel>= 19.0.0, <= 19.0.5
FacebookReact-Server-Dom-Parcel>= 19.1.0, <= 19.1.6
FacebookReact-Server-Dom-Parcel>= 19.2.0, <= 19.2.5
FacebookReact-Server-Dom-Turbopack>= 19.0.0, <= 19.0.5
FacebookReact-Server-Dom-Turbopack>= 19.1.0, <= 19.1.6
FacebookReact-Server-Dom-Turbopack>= 19.2.0, <= 19.2.5
FacebookReact-Server-Dom-Webpack>= 19.0.0, <= 19.0.5
FacebookReact-Server-Dom-Webpack>= 19.1.0, <= 19.1.6
FacebookReact-Server-Dom-Webpack>= 19.2.0, <= 19.2.5

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-23870?
A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to server crashes, out-of-memory exceptions or excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5).
How severe is CVE-2026-23870?
CVE-2026-23870 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.53% probability of exploitation in the next 30 days.
How do I fix CVE-2026-23870?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST